Search gender: all male female 琉成 Japanese Boy Names Variations. 1 names found. gender: all male female Name: ryusei Katakana: リュウセイ 2 Kanji: 琉成 Meaning: 琉Ruri(lapis lazuli). Name of a gemstone. A deep blue to indigo-colored gemstone. One of the seven treasures. 成To finish. Grow. To raise up. Accomplish. To be fruitful. to change into Good. splendid. large. well-organized. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > 琉成 Japanese Boy Names Variations.